Charles Randol, an elder from Cortez, Cecil Canuto, of Gallup, and Frank Welcher, of Cortez, taught at the school during the first couple of years of its existence. In 1967, Felix Tarbet came to the school as its first full-time administrator. At this time, congregations in Farmington, Aztec, Gallup, and Durango become involved in the work at Hogback. By the spring of 1968, the congregation that had been planted at Hogback had grown to a regular attendance of 100 persons, most of whom were Navajo. The need for a new assembly building was answered by the 4th Street Church of Christ in Albuquerque. They purchased a 1200 square foot building and had it moved to the Hogback property. A Vacation Bible School was held at Hogback for the first time during the summer of 1968. In 1968, J. B. Herrington, preacher for the Farmington Church of Christ, became associated with the school at Hogback. Together with Cecil Canuto and Felix Tarbet, brother Herrington served as a full-time teacher. By the end of 1968, the Hogback school and church were growing at a remarkable pace and serious inroads were being made into the Navajo Nation. By 1969, many congregations throughout the country were beginning to hear about the efforts to share the Gospel with the Navajo people. They were responding with financial support and in sending workers into the field. During the Summer of 1969, four Vacation Bible Schools were conducted on the Reservation. A total of 400 hundred Navajos attended. The church from Searcy, Arkansas conducted a V.B.S. in the Chinle-Many Farms area that resulted in brother J. B. Johnson moving to Many Farms and establishing a congregation there. Feliz Tarbet, with the involvement of the Parkway Drive church from Lubbock, Texas, held a V.B.S. at Fort Defiance, Arizona. This led to the establishment of a congregation at Fort Defiance. Harold Payden and members of the church from Albuquerque held a V.B.S. at Carson, New Mexico, and the Corinth Road Church of Christ conducted a V.B.S. at Nageezi, NM. Both efforts were very productive. In 1970, a total of nine Vacation Bible Schools were held on the Reservation. These congregations were involved: Parkway Drive; Mesa, Arizona; Searcy, Arkansas; Dora, New Mexico; Hamilton, Texas; Corpus Christi, Texas; Roseville, California; and others. During 1970, Paul and Mary Jones from Hamilton, Texas, and Skip and Josie Knox from lowa Park, Texas, moved to Hogback and became a great help in teaching the Navajos.

The McPherson family from Hamilton moved to Neschiti, NM to work with the Bureau of Indian Affairs school and also became involved with the teaching program at Hogback. The church in Roseville, CA donated a Volkswagen bus to be used by the church and school. In 1970, Felix Tarbet's health began to fail, perhaps from the high altitude and the strenuous labor required in working such a large area as the Navajo Reservation. In November 1970, Felix accepted a work in the Sacramento, California area, and he reluctantly left Hogback. On this same date, Bob Cheatham became the new director of the mission. In 1971, the Navajo work experienced much expansion from the results of the many Vacation Bible School programs held on the reservation. J. B. Johnson from Searcy, Arkansas moved to Chinle, Arizona. His work resulted in the planting of a church at Many Farms. Skip Knox moved to Montezuma Creek, Utah, working under the oversight of the lowa Park, Texas congregation. A small church already existed there, but Skip began an outreach to Navajos that resulted in twelve persons being converted to Christ in a period of two-and-a-half years. Also in 1971, a Vacation Bible School held at Kayenta, Arizona by members of several California churches (Orangevale, Roseville, and Citrus Heights) resulted in the baptisms of two Navajo persons. In order to keep this work alive, members of the Cortez Church of Christ drove 120 miles to Kayenta each Lord"s day and held worship services and Bible classes. Don Tullis, one of the elders of the Cortez church, was instrumental in the effort to build the church in Kayenta. He procured a room at a Kayenta motel to hold worship services. For a time, he lived on sight in a trailer home. In July, 1973, three missionary families moved to Kayenta: Steve and Pam Wilson, T and Nina Middlebrook, and Fred and Susan Austin.